[Grains]

That is amazing!

I loved the link you included. Pictures/Movies help me

How long in time, do you think it would take for a pothole like that to form?

[Turtle]

Originally Posted by Grains

That is amazing!

I loved the link you included. Pictures/Movies help me

How long in time, do you think it would take for a pothole like that to form?

Danke.

The time required is very dependant on factors such as rock type, frequency of high water levels, number & type of entrapped 'hammer' stones, to name a few. All I can say for sure, is they take many years to form.

I went looking for the geology of the area and found the bedrock there referred to as 'mafic lava'. >> http://www.secstate.wa.gov/library/d...006_002120.pdf
Looking further, and based on my observations , I think the rock type is gabbro. >> Gabbro - Wikipedia, the free encyclopedia

[Grains]

Originally Posted by Turtle

Danke.

The time required is very dependant on factors such as rock type, frequency of high water levels, number & type of entrapped 'hammer' stones, to name a few. All I can say for sure, is they take many years to form.

I went looking for the geology of the area and found the bedrock there referred to as 'mafic lava'. >> http://www.secstate.wa.gov/library/d...006_002120.pdf
Looking further, and based on my observations , I think the rock type is gabbro. >> Gabbro - Wikipedia, the free encyclopedia

Very cool!!! Thanks for the links! That was very informative about Gabbro I had no idea!